So far, I really like SoGo, but I see a couple of fundamental user issues.

1) The three-pane and two-pane mail views both have the same column width for the message list, and there seems to be no way to change this.
As a result, long sender addresses and long subject lines can't be read in full without opening the mail. If I access SoGo WITHOUT a widescreen display, it therefore find it takes a long time to process new mail, as each mail must be opened to view the full sender and subject.

REQUEST - add the ability for users to resize the 3 pane widths.

2) SPAM handling
Is there a way of classifying mail as spam and automatically moving it to a spam folder? I can't find one.

REQUEST A - Add a 'spam' button next to the delete button

REQUEST B - Provide feedback to Zentyal spam filter that the message was classified by the user as spam.